Grab a pair of light hand weights (or something equally hefty) for this fiery all levels workout! Using variations on the Pilates mat exercises we know and love, we'll fire up the core and bring the heat to the shoulders, biceps, and triceps. By combining exercises to tone the upper body with movements that challenge the core, we get a TON of bang for a buck in a quickie workout. Heads up! We start on hands and knees - if that doesn't work for you, check out the alternate beginning.